Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes?
Argentine populations of Dichroplus elongatus (Orthoptera: Acrididae) are polymorphic for B chromosomes. Previous studies showed that B chromosomes affect body size and some fitness components in Northwestern populations. We studied phenotype and B′s variation patterns along a latitudinal cline as w...
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todo:paper_1010061X_v26_n4_p719_Rosetti2023-10-03T15:55:54Z Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? Rosetti, N. Remis, M.I. B chromosomes Clinal pattern Morphometric traits Orthoptera Population genetics body size chromosome coevolution fitness genome grasshopper latitudinal gradient life history trait local adaptation morphometry phenotype adaptation animal Argentina article body size Caelifera climate genetic selection genetic variability genetics genome geography insect chromosome karyotype male molecular evolution phenotype physiology population genetics quantitative trait time Adaptation, Biological Animals Argentina Body Size Chromosomes, Insect Climate Evolution, Molecular Genetic Variation Genetics, Population Genome, Insect Geography Grasshoppers Karyotype Male Phenotype Quantitative Trait, Heritable Selection, Genetic Time Factors Acrididae Caelifera Dichroplus elongatus Orthoptera Argentine populations of Dichroplus elongatus (Orthoptera: Acrididae) are polymorphic for B chromosomes. Previous studies showed that B chromosomes affect body size and some fitness components in Northwestern populations. We studied phenotype and B′s variation patterns along a latitudinal cline as well as the relationship between karyotype and body size related traits in 17 populations from East. Body size related traits showed a 'saw tooth' pattern of variation being small at low and high latitudes and large at intermediate latitudes in most of the analysed populations. Analyses of variance and principal components demonstrated that in most analysed populations B carrier males are associated with a decrease in body size related traits with respect to individuals with standard karyotype. Accordingly with the relationship between karyotype and body size, an opposite pattern of latitudinal variation in the frequencies of B′s with respect to body size variation was observed in this area. i.e. smaller individuals tend to have a higher frequency of B chromosomes. The comparison of the differentiation of both karyotype and body size traits with molecular neutral markers demonstrated the relative importance of selection moulding chromosome and phenotype variation. The observed pattern of phenotypic variation is likely to be the result of local adaptation to season length along the latitudinal gradient. The observed contrary pattern of B′s clinal variation may reflect the population ability to maintain this chromosome in relation to the local adaptation. The available evidence indicates that the distribution of B chromosome frequency was shaped by selective factors. © 2013 The Authors. Journal of Evolutionary Biology © 2013 European Society For Evolutionary Biology. Fil:Rosetti, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Remis, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1010061X_v26_n4_p719_Rosetti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
B chromosomes Clinal pattern Morphometric traits Orthoptera Population genetics body size chromosome coevolution fitness genome grasshopper latitudinal gradient life history trait local adaptation morphometry phenotype adaptation animal Argentina article body size Caelifera climate genetic selection genetic variability genetics genome geography insect chromosome karyotype male molecular evolution phenotype physiology population genetics quantitative trait time Adaptation, Biological Animals Argentina Body Size Chromosomes, Insect Climate Evolution, Molecular Genetic Variation Genetics, Population Genome, Insect Geography Grasshoppers Karyotype Male Phenotype Quantitative Trait, Heritable Selection, Genetic Time Factors Acrididae Caelifera Dichroplus elongatus Orthoptera |
| spellingShingle |
B chromosomes Clinal pattern Morphometric traits Orthoptera Population genetics body size chromosome coevolution fitness genome grasshopper latitudinal gradient life history trait local adaptation morphometry phenotype adaptation animal Argentina article body size Caelifera climate genetic selection genetic variability genetics genome geography insect chromosome karyotype male molecular evolution phenotype physiology population genetics quantitative trait time Adaptation, Biological Animals Argentina Body Size Chromosomes, Insect Climate Evolution, Molecular Genetic Variation Genetics, Population Genome, Insect Geography Grasshoppers Karyotype Male Phenotype Quantitative Trait, Heritable Selection, Genetic Time Factors Acrididae Caelifera Dichroplus elongatus Orthoptera Rosetti, N. Remis, M.I. Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? |
| topic_facet |
B chromosomes Clinal pattern Morphometric traits Orthoptera Population genetics body size chromosome coevolution fitness genome grasshopper latitudinal gradient life history trait local adaptation morphometry phenotype adaptation animal Argentina article body size Caelifera climate genetic selection genetic variability genetics genome geography insect chromosome karyotype male molecular evolution phenotype physiology population genetics quantitative trait time Adaptation, Biological Animals Argentina Body Size Chromosomes, Insect Climate Evolution, Molecular Genetic Variation Genetics, Population Genome, Insect Geography Grasshoppers Karyotype Male Phenotype Quantitative Trait, Heritable Selection, Genetic Time Factors Acrididae Caelifera Dichroplus elongatus Orthoptera |
| description |
Argentine populations of Dichroplus elongatus (Orthoptera: Acrididae) are polymorphic for B chromosomes. Previous studies showed that B chromosomes affect body size and some fitness components in Northwestern populations. We studied phenotype and B′s variation patterns along a latitudinal cline as well as the relationship between karyotype and body size related traits in 17 populations from East. Body size related traits showed a 'saw tooth' pattern of variation being small at low and high latitudes and large at intermediate latitudes in most of the analysed populations. Analyses of variance and principal components demonstrated that in most analysed populations B carrier males are associated with a decrease in body size related traits with respect to individuals with standard karyotype. Accordingly with the relationship between karyotype and body size, an opposite pattern of latitudinal variation in the frequencies of B′s with respect to body size variation was observed in this area. i.e. smaller individuals tend to have a higher frequency of B chromosomes. The comparison of the differentiation of both karyotype and body size traits with molecular neutral markers demonstrated the relative importance of selection moulding chromosome and phenotype variation. The observed pattern of phenotypic variation is likely to be the result of local adaptation to season length along the latitudinal gradient. The observed contrary pattern of B′s clinal variation may reflect the population ability to maintain this chromosome in relation to the local adaptation. The available evidence indicates that the distribution of B chromosome frequency was shaped by selective factors. © 2013 The Authors. Journal of Evolutionary Biology © 2013 European Society For Evolutionary Biology. |
| format |
JOUR |
| author |
Rosetti, N. Remis, M.I. |
| author_facet |
Rosetti, N. Remis, M.I. |
| author_sort |
Rosetti, N. |
| title |
Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? |
| title_short |
Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? |
| title_full |
Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? |
| title_fullStr |
Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? |
| title_full_unstemmed |
Latitudinal clines in the grasshopper Dichroplus elongatus: Coevolution of the A genome and B chromosomes? |
| title_sort |
latitudinal clines in the grasshopper dichroplus elongatus: coevolution of the a genome and b chromosomes? |
| url |
http://hdl.handle.net/20.500.12110/paper_1010061X_v26_n4_p719_Rosetti |
| work_keys_str_mv |
AT rosettin latitudinalclinesinthegrasshopperdichropluselongatuscoevolutionoftheagenomeandbchromosomes AT remismi latitudinalclinesinthegrasshopperdichropluselongatuscoevolutionoftheagenomeandbchromosomes |
| _version_ |
1807317285766955008 |